They said nothing of the sort, either in the Declaration or subsequently.
You are simply a typical "liberal" Democrat hoping to redefine the terms according to your own wishes.
It says exactly that very thing. Read it again.
"That to secure these Rights, Governments are instituted among Men, deriving their just Powers from the Consent of the Governed, that whenever any Form of Government becomes destructive of these Ends, it is the Right of the People to alter or to abolish it, and to institute new Government, laying its Foundation on such Principles, and organizing its Powers in such Form, as to them shall seem most likely to effect their Safety and Happiness."
The people get to decide when their government becomes "destructive of these ends." Nobody else, just the people who object to their treatment under the government.
Just as every individual has a right to be free of his master, so too do people collectively have a right to be free of theirs.